New API: f2fs_expand

Expose the resize.f2fs utility from f2fs-tools, to expand a f2fs
filesystem.

daemon/Makefile.am

@@ -113,6 +113,7 @@ guestfsd_SOURCES = \
 	du.c \
 	echo-daemon.c \
 	ext2.c \
+	f2fs.c \
 	fallocate.c \
 	file.c \
 	fill.c \

daemon/f2fs.c

@@ -0,0 +1,49 @@
+/* libguestfs - the guestfsd daemon
+ * Copyright (C) 2018 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "daemon.h"
+#include "actions.h"
+#include "optgroups.h"
+
+int
+optgroup_f2fs_available (void)
+{
+  return prog_exists ("resize.f2fs");
+}
+
+int
+do_f2fs_expand (const char *device)
+{
+  CLEANUP_FREE char *err = NULL;
+  int r;
+
+  r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
+                "resize.f2fs", device, NULL);
+  if (r == -1) {
+    reply_with_error ("%s", err);
+    return -1;
+  }
+
+  return 0;
+}

generator/actions_core.ml

@@ -9708,4 +9708,13 @@ When growing a partition you will want to grow the filesystem
 afterwards, but when shrinking, you need to shrink the filesystem
 before the partition." };
 
+  { defaults with
+    name = "f2fs_expand"; added = (1, 39, 3);
+    style = RErr, [String (Device, "device")], [];
+    optional = Some "f2fs";
+    shortdesc = "expand a f2fs filesystem";
+    longdesc = "\
+This expands a f2fs filesystem to match the size of the underlying
+device." };
+
 ]

generator/proc_nr.ml

@@ -512,6 +512,7 @@ let proc_nr = [
 502, "inspect_get_drive_mappings";
 503, "part_set_gpt_attributes";
 504, "part_get_gpt_attributes";
+505, "f2fs_expand";
 ]
 
 (* End of list.  If adding a new entry, add it at the end of the list

lib/MAX_PROC_NR

@@ -1 +1 @@
-504
+505